Topic:
May monthly Level 1B visible calibration update and prelaunch visible calibration update
Date/Time(UTC) Message Issued:
8 May 2007, 1450 UTC
Satellite(s) Involved:
NOAA-15, 16, 17, 18
Instrument(s) Involved:
AVHRR
Product(s) Involved/Affected:
Channels 1, 2, and 3a
Date/Time(UTC) of Initial Implementation:
8 May 2007, Time 1330 UTC
Details/Specifics of Change:
The May visible calibration update and Version III prelaunch visible calibration update were made operational on 8 May 2007 at 1330 UTC. The first orbits processed after the changes will be:
NSS.HRPT.NK.D07128.S1354.E1403.B4670505.GC
NSS.GHRR.NK.D07128.S1211.E1352.B4670405.GC
NSS.GHRR.NL.D07128.S0930.E1125.B3414950.GC
NSS.HRPT.NL.D07128.S1438.E1449.B3415252.GC
NSS.HRPT.NM.D07128.S1504.E1518.B2530909.WI
NSS.GHRR.NM.D07128.S1313.E1503.B2530809.WI
NSS.LHRR.NM.D07128.S1323.E1334.B2530808.WI
NSS.HRPT.NN.D07128.S1329.E1342.B1012626.GC
NSS.GHRR.NN.D07128.S1141.E1328.B1012526.GC
NSS.LHRR.NN.D07128.S1617.E1628.B1012728.GC
The new visible calibration coefficients are:
NOAA-18 AVHRR
Ch_1_lo = 0.05284*count - 2.083, count<501.00
Ch_1_hi = 0.1575*count - 54.18, count>501.00
Ch_2_lo = 0.06160*count - 2.427, count<500.00
Ch_2_hi = 0.1848*count - 64.40, count>500.00
NOAA-17 AVHRR
Ch_1_lo = 0.05548*count - 2.220, count<501.12
Ch_1_hi = 0.1629*count - 56.04, count>501.12
Ch_2_lo = 0.06680*count - 2.623, count<500.73
Ch_2_hi = 0.1988*count - 68.85, count>500.73
Ch_3_lo = 0.03221*count - 1.358, count<501.37
Ch_3_hi = 0.2258*count - 98.57, count>501.37
NOAA-16 AVHRR
Ch_1_lo = 0.05529*count - 2.132, count<498.96
Ch_1_hi = 0.1614*count - 54.85, count>498.96
Ch_2_lo = 0.06006*count - 2.269, count<500.16
Ch_2_hi = 0.1770*count - 60.74, count>500.16
These coefficients are intended to be optimal on May 26, in the middle of the two scheduled updates.
Check this website for the version III prelaunch visible calibration coefficients - http://www.orbit.nesdis.noaa.gov/smcd/spb/fwu/solar_cal/AVHRR3_Prelaunch_CalCoeff.html
Contact Person(s) Name/Email/Phone Number for Questions:
Emily Harrod Emily.Harrod@noaa.gov 301-817-3882
Jerry Sullivan Jerry.T.Sullivan@noaa.gov 301-763-8042
Web site(s) that contain other relevant information (where applicable):
http://www.osdpd.noaa.gov/PSB/PPP/PPP.html - History of level 1B notices
http://www.ssd.noaa.gov/PS/SATS/messages.html - All user notices
http://www.oso.noaa.gov/poes/index.htm - SOCC polar satellite status
http://www.oso.noaa.gov/goes/index.htm - SOCC geostationary satellite status
http://www.oso.noaa.gov/daily-news/index.asp - SOCC morning reports
--
*******************************************
*
* Emily D. Harrod
* NOAA/NESDIS/OSDPD/IPD
* Computer Operations Branch
* Pre-Product Processing Group
* E/SP11, NSOF, room 1460
* 4231 Suitland Road
* Suitland, Maryland 20746-4304
* USA
* voice 301-817-3882
* fax 301-817-3902
* email Emily.Harrod@noaa.gov
*